Smoking during pregnancy is related to violent crimes…  Brennan, Grekin, & Mednick (1999) –Subjects were a birth cohort of 4169 males born between September 1959 and December 1961 in Copenhagen, Denmark –During the third trimester of pregnancy, mothers self-reported the number of cigarettes smoked daily –When the male offspring were 34 years of age, their arrest histories were checked in the Danish National Criminal Register
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